Three students who attend Quaboag Regional High School were killed in a one-car rollover crash in West Brookfield Tuesday afternoon, authorities said.

“Our district suffered a tremendous loss tonight,” Brett Kustigian, superintendent of the Quaboag Regional School District in Warren, said in a statement confirming the deaths.

The teenagers — two girls and a boy — were not identified. At least two had to be extricated from the 2009 Mazda A6 with the Jaws of Life. The third may have been ejected, said David Procopio, a spokesman for the State Police.

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The teens were traveling south on Douglas road about ¼-mile from Route 9 at about 3:30 p.m. when their car left the road, struck a tree and rolled over, the Worcester district attorney’s office said in a statement Tuesday night.

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The three teens were pronounced dead at the scene. “The Office of the State Medical Examiner has accepted the case,” the statement said.

The State Police crime scene investigators and the crash reconstruction unit were called to the scene, according to Procopio.

West Brookfield police are also investigating.

Grief counselors will be available at the high school on Wednesday, Kustigian said.

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“I [want] the Quaboag community to know that we are here to support our students,” Kustigian said. “Quaboag is a special place where everyone knows each other and we will be there to support one another.”

Globe correspondent Alyssa Meyers contributed to this report. Jake Johnson can be reached at Jake.Johnson@globe.com.